I like to think it is all of those things plus as a preschool teacher, I've realized that there are crazy amounts of fun holidays and therefore fun preschool crafts to be done in the Fall.
I mean you have Apple Season, Mexican Independence Day, Pumpkin Season, Harvest Parties, Halloween, Fall Trees, Fall Animals, Veterans Day, Thanksgiving, and of course Christmas.
Have you noticed that there are so many cute crafts available for all of these units?? This year for our Thanksgiving Feast with YWAM (Youth With A Mission) San Diego/Baja, our preschool students at Little Builder's Preschool are in charge of decorations. We have been busy making turkeys, fall trees, Mayflower Journey, placemats, Thankful Candles, Silly Handprint Scarecrows, etc*. The list literally goes on & on.
*Click on the Links for tutorials on how we made each of these.